*[http://kowari.org/ kowari]: database for the storage, retrieval and analysis of RDF and OWL metadata; non-relational, written in Java.

+

*[http://kowari.org/ Kowari]: database for the storage, retrieval and analysis of RDF and OWL metadata; non-relational, written in Java.

+

*[http://www.mulgara.org/ Mulgara] is a scalable RDF database written entirely in Java. Mulgara is an Open Source fork of [http://kowari.org/ Kowari].

*[http://arc.web-semantics.org/ ARC - RDF and SPARQL for PHP developers] is a lightweight, SPARQL-enabled RDF system for mainstream Web projects. It is written in PHP and has been optimized for shared (or otherwise performance- or privilege-limited) Web environments.

*[http://arc.web-semantics.org/ ARC - RDF and SPARQL for PHP developers] is a lightweight, SPARQL-enabled RDF system for mainstream Web projects. It is written in PHP and has been optimized for shared (or otherwise performance- or privilege-limited) Web environments.

-

*[http://threestore.sourceforge.net/ 3store] - developed in the Intelligence, Agents and Multimedia research group at Southampton University, as part of the [http://www.aktors.org/akt/ AKT Project].

+

*[http://threestore.sourceforge.net/ 3store] - a C library that uses MySQL to store its raw RDF data and caches, part of the [http://www.aktors.org/akt/ AKT Project].

+

*[http://rdfbroker.opendfki.de/ OpenDFKI RDFBroker] is an RDF store that uses a natural mapping of RDF resources to database tables that does not rely on RDF Schema, but constructs a schema based on the occurring signatures, where a signature is the set of properties used on a resource

*[http://activerdf.org/ ActiveRDF] is a library for accessing RDF data from Ruby programs

*[http://activerdf.org/ ActiveRDF] is a library for accessing RDF data from Ruby programs

**[http://esw.w3.org/topic/HCLSIG_BioRDF_Subgroup/Tasks/Ruby_On_Rails_and_ActiveRDF Ruby On Rails and ActiveRDF] - HCLSIG subgroup task - to produce a Ruby On Rails and Active RDF implementation of the BioDash eclipse (Java) based gui so that we can show that the functionality shown in BioDash can be implemented using web based technologies.

**[http://esw.w3.org/topic/HCLSIG_BioRDF_Subgroup/Tasks/Ruby_On_Rails_and_ActiveRDF Ruby On Rails and ActiveRDF] - HCLSIG subgroup task - to produce a Ruby On Rails and Active RDF implementation of the BioDash eclipse (Java) based gui so that we can show that the functionality shown in BioDash can be implemented using web based technologies.

*[http://www.w3.org/2001/12/rubyrdf/intro.html Ruby RDF] was an experimental RDF system implemented in Ruby. It is no longer under active development.

*[http://www.w3.org/2001/12/rubyrdf/intro.html Ruby RDF] was an experimental RDF system implemented in Ruby. It is no longer under active development.

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*[http://rdflib.net/ RDFLib] - Python library for working with RDF

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**[http://wiki.python.org/moin/RdfLib RDFLib Wiki]

-

*[http://www.mnot.net/sw/sparta/ Sparta] is an Python API for RDF that is designed to help easily learn and navigate the Semantic Web programmatically. Unlike other RDF interfaces, which are generally triple-based, Sparta binds RDF nodes to Python objects and RDF arcs to attributes of those Python objects.

**[http://oort.to/ Oort] - a Python toolkit for accessing RDF graphs as plain objects (it has RDFLib under the crust)

+

**[http://www.mnot.net/sw/sparta/ Sparta] is an Python API for RDF that is designed to help easily learn and navigate the Semantic Web programmatically. Unlike other RDF interfaces, which are generally triple-based, Sparta binds RDF nodes to Python objects and RDF arcs to attributes of those Python objects.

*provides scalable database backends (Jena, AllegroGraph, Oracle 10g and Sesame) as well as multi-user support

===Parsers===

===Parsers===

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*[http://www.dfki.uni-kl.de/~grimnes/2006/03/RDFRoom/ RDFRoom] is an isometric RDF viewer. It gives the user ways to view and manipulate his RDF data that might make him see the data in a brand new perspective.

*[http://www.dfki.uni-kl.de/~grimnes/2006/03/RDFRoom/ RDFRoom] is an isometric RDF viewer. It gives the user ways to view and manipulate his RDF data that might make him see the data in a brand new perspective.

*[http://www.w3.org/2001/11/IsaViz/ IsaViz] is a visual environment for browsing and authoring RDF models represented as graphs.

*[http://www.w3.org/2001/11/IsaViz/ IsaViz] is a visual environment for browsing and authoring RDF models represented as graphs.

*[http://www.daml.org/2003/09/dumpont/ DumpOnt] is a program to display the class and property hierarchies present in an RDF Schema or DAML+OIL or OWL ontology (based on Jena2).

*[http://www.daml.org/2003/09/dumpont/ DumpOnt] is a program to display the class and property hierarchies present in an RDF Schema or DAML+OIL or OWL ontology (based on Jena2).

*[http://www.co-ode.org/downloads/owldoc/co-ode-index.php OWLDoc] is a tool that generates JavaDoc style html page documentation for an OWL ontology.

*[http://www.co-ode.org/downloads/owldoc/co-ode-index.php OWLDoc] is a tool that generates JavaDoc style html page documentation for an OWL ontology.

*[http://simile.mit.edu/gadget/ Gadget] is an XML inspector. It is able to process large quantities of well-formed XML and produce a condensed summary of that data. [http://simile.mit.edu/gadget/live/ Live demo]

*[http://simile.mit.edu/gadget/ Gadget] is an XML inspector. It is able to process large quantities of well-formed XML and produce a condensed summary of that data. [http://simile.mit.edu/gadget/live/ Live demo]

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*[http://semweb.salzburgresearch.at/apps/rdf-gravity/index.html RDF-Gravity] is a tool for visualising RDF/OWL Graphs/ ontologies

**[http://www.wiwiss.fu-berlin.de/suhl/bizer/d2r-server/ D2R Server] - SPARQL endpoint for relational databases; combines the D2RQ API and Joseki SPARQL Server to map a database's contents into a virtual RDF graph that can be accessed over the SPARQL protocol. It is bundled with a Jetty webserver and aims at being easy to set up and use.

**[http://www.wiwiss.fu-berlin.de/suhl/bizer/d2r-server/ D2R Server] - SPARQL endpoint for relational databases; combines the D2RQ API and Joseki SPARQL Server to map a database's contents into a virtual RDF graph that can be accessed over the SPARQL protocol. It is bundled with a Jetty webserver and aims at being easy to set up and use.

**[http://triplify.org/Overview Triplify] is a small plugin for Web applications, which reveals the semantic structures encoded in relational databases by making database content available as RDF, JSON or Linked Data.

+

*[http://simile.mit.edu/RDFizers/ RDFizers] are tools that allow to transform existing data into an RDF representation.

*[http://simile.mit.edu/RDFizers/ RDFizers] are tools that allow to transform existing data into an RDF representation.

*[http://tripletest.sourceforge.net/ Tripletest] is a testing framework for RDF triplestores

*[http://tripletest.sourceforge.net/ Tripletest] is a testing framework for RDF triplestores

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***[http://www.eclipse.org/emft/projects/eodm/ EODM Workbench] is part of IODT

***[http://www.eclipse.org/emft/projects/eodm/ EODM Workbench] is part of IODT

**[http://ontoedit.com/ OntoStudio] is the leading engineering environment for ontologies and for the development of semantic applications; based on Eclipse

**[http://ontoedit.com/ OntoStudio] is the leading engineering environment for ontologies and for the development of semantic applications; based on Eclipse

*[http://www.vistology.com/basevisor/ BaseVISor] is VIStology's versatile forward-chaining inference engine specialized to handle facts in the form of RDF triples with support for RuleML, R-Entailment and XML Schema Datatypes.

*A ''reasoner'' is a service that takes the statements encoded (asserted) in an ontology as input and derives (infers) new statements from them. In particular, OWL reasoners can be used to:

*A ''reasoner'' is a service that takes the statements encoded (asserted) in an ontology as input and derives (infers) new statements from them. In particular, OWL reasoners can be used to:

*[http://dsg.port.ac.uk/projects/uisb/ The Universal Information Service Browser (UISB) Project] The aim of the UISB Project is to investigate and improve interaction with Information Services used in a range of distributed environments, in the first instance these will include Web Services, UDDI and the Jini Lookup Service.

*[http://dsg.port.ac.uk/projects/uisb/ The Universal Information Service Browser (UISB) Project] The aim of the UISB Project is to investigate and improve interaction with Information Services used in a range of distributed environments, in the first instance these will include Web Services, UDDI and the Jini Lookup Service.

**[http://research.nokia.com/research/projects/swapme/index.html SwapMe (Semantic Web Application Platform for Mobile Ecosystems)] project will develop a new software architecture that will enable the mobile ecosystem to take maximum advantage of the power of the Semantic Web data model

Kowari: database for the storage, retrieval and analysis of RDF and OWL metadata; non-relational, written in Java.

Mulgara is a scalable RDF database written entirely in Java. Mulgara is an Open Source fork of Kowari.

ARC - RDF and SPARQL for PHP developers is a lightweight, SPARQL-enabled RDF system for mainstream Web projects. It is written in PHP and has been optimized for shared (or otherwise performance- or privilege-limited) Web environments.

3store - a C library that uses MySQL to store its raw RDF data and caches, part of the AKT Project.

OpenDFKI RDFBroker is an RDF store that uses a natural mapping of RDF resources to database tables that does not rely on RDF Schema, but constructs a schema based on the occurring signatures, where a signature is the set of properties used on a resource

Ruby On Rails and ActiveRDF - HCLSIG subgroup task - to produce a Ruby On Rails and Active RDF implementation of the BioDash eclipse (Java) based gui so that we can show that the functionality shown in BioDash can be implemented using web based technologies.

Ruby RDF was an experimental RDF system implemented in Ruby. It is no longer under active development.

Oort - a Python toolkit for accessing RDF graphs as plain objects (it has RDFLib under the crust)

Sparta is an Python API for RDF that is designed to help easily learn and navigate the Semantic Web programmatically. Unlike other RDF interfaces, which are generally triple-based, Sparta binds RDF nodes to Python objects and RDF arcs to attributes of those Python objects.

D2R Server - SPARQL endpoint for relational databases; combines the D2RQ API and Joseki SPARQL Server to map a database's contents into a virtual RDF graph that can be accessed over the SPARQL protocol. It is bundled with a Jetty webserver and aims at being easy to set up and use.

KAON Reverse is a prototype GUI for mapping relational database content to ontologies.

Triplify is a small plugin for Web applications, which reveals the semantic structures encoded in relational databases by making database content available as RDF, JSON or Linked Data.

RDFizers are tools that allow to transform existing data into an RDF representation.

BioDash is a Semantic Web prototype of a Drug Development Dashboard that associates disease, compounds, drug progression stages, molecular biology, and pathway knowledge for a team of users (built on Haystack)

RDF crawlers

RDF crawler - uses Jena RDF toolkit to spider the web gathering up semantic web data and to store it in any of Jena's backend stores

SweDE is built on the Eclipse IDE, includes an OWL editor with helpful features like syntax highlighting, autocompletion, and error-detection. It also currently integrates existing tools like the OWL Validator, Kazuki (OWL to Java code generator), and DumpOnt (Ontology Visualizer).

Ontology Managers

KAON is an open-source ontology management infrastructure targeted for business applications. It includes a comprehensive tool suite allowing easy ontology creation and management and provides a framework for building ontology-based applications. An important focus of KAON is scalable and efficient reasoning with ontologies.

Commercial

RacerPro (Renamed ABox and Concept Expression Reasoner) is an OWL reasoner and inference server (also available from Franz Inc)

Web Services

The Universal Information Service Browser (UISB) Project The aim of the UISB Project is to investigate and improve interaction with Information Services used in a range of distributed environments, in the first instance these will include Web Services, UDDI and the Jini Lookup Service.